54 lines
1.4 KiB
Python
54 lines
1.4 KiB
Python
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"""This script diffs two dumps of symbol sizes by matching up the symbol names
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To generate the input files do something like:
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arm-none-eabi-nm --size-sort build-bluemicro833/firmware.elf > new_sizes.txt
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The command will vary by board and along with git state.
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To print the diff do:
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python diff_nm_sizes.py old_sizes.txt new_sizes.txt
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"""
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import sys
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import pathlib
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old = pathlib.Path(sys.argv[-2])
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new = pathlib.Path(sys.argv[-1])
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old_symbols = {}
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old_total_size = 0
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longest_symbol = 0
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for line in old.read_text().split("\n"):
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if not line:
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continue
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size, t, name = line.split()
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old_size = int(size, 16)
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old_total_size += old_size
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old_symbols[name] = old_size
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longest_symbol = max(longest_symbol, len(name))
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new_total_size = 0
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for line in new.read_text().split("\n"):
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if not line:
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continue
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size, t, name = line.split()
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size = int(size, 16)
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new_total_size += size
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if name not in old_symbols:
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print(f"{name:<{longest_symbol}}{size:>+6}")
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else:
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old_size = old_symbols[name]
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del old_symbols[name]
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if size == old_size:
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continue
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print(f"{name:<{longest_symbol}}{size - old_size:>+6}")
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for name in old_symbols:
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old_size = old_symbols[name]
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print(f"{name:<{longest_symbol}}{-old_size:>+6}")
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print()
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total_label = f"Total {new_total_size} - {old_total_size}"
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print(f"{total_label:<{longest_symbol}}{new_total_size - old_total_size:>+6}")
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